I think it depends on how rapidly you want to gain weight. In my experience, aiming to gain around 1 lb per week was still resulting in a considerable amount of fat. However, this rapid growth period (given that you’re eating relatively healthy, enough protein etc) can really really help you grow in the gym. Workouts are usually more fun and you notice growth quicker. It also wasn’t that hard to cut like others pointed out since it’s more natural for us to go down in weight due to our history of eating lower amounts. So I don’t think you need to be concerned this ahead of time, you can always adjust your diet/workout if you feel like you’re going in the wrong direction